/**
* Iterates over each result of a query, calling a callback for each one. The
* items are processed in an unspecified order. The query may not have any
* sort order, and may not use limit or skip.
*
* @param callable $callback Callback that will be called with each result
* of the query.
* @param bool $useMasterKey
* @param int $batchSize
*
* @throws \Exception If query has sort, skip, or limit.
*/
public function each($callback, $useMasterKey = false, $batchSize = 100)
{
if ($this->orderBy || $this->skip || $this->limit >= 0) {
throw new Exception('Cannot iterate on a query with sort, skip, or limit.');
}
$query = new self($this->className);
$query->where = $this->where;
$query->includes = $this->includes;
$query->limit = $batchSize;
$query->ascending('objectId');
$finished = false;
while (!$finished) {
$results = $query->find($useMasterKey);
$length = count($results);
for ($i = 0; $i < $length; $i++) {
$callback($results[$i]);
}
if ($length == $query->limit) {
$query->greaterThan('objectId', $results[$length - 1]->getObjectId());
} else {
$finished = true;
}
}
}
